Install KDE

- Click on the round icon in the right top corner to display the Desktop Managers available in the lightdm drop-down menu and select one:
GNOME Classic
GNOME Classic (no effects)
KDE Plasma Workspace
Sugar

It appears that lightdm which is added when KDE is installed picks up Gnome also (used by Sugar)

Install GNOME

Notes

From IRC Aug 3 2013
<dfarning> You can download the new alpha image from
<dfarning> http://ubuntu.activitycentral.com/makeiso/iso/ubuntu_12.04-20130730_i686.iso
<dfarning> (md5 a91fb1e3b8bdc1c8bdea701702ef807c)
<dfarning> In this release all control panel sections should work:
<dfarning> - The keyboard section was failing because of libxklavier lacking the...
...
<dfarning> satellit_e: Dextrose on Trisquel, the new toast, should be coming out this week or later for those who prefer 100% free :)

From Lists: support-gang@laptop.org 07/15/2013
I just wanted to give everyone a heads about something coming down the pipe:)
On of the primary frustrations that I have been hearing from the
community is their inability to easily get hardware for their
deployments.
In response, we have released of an iso running Sugar on Ubuntu at
http://ubuntu.activitycentral.com/makeiso/iso/ubuntu_12.04-20130712_i686.iso
* Username is "ubuntu", with empty password.
As alway, AC's code is 100% free and open source.

What's new

* Tuned up python-dbus clears the last bug that made most activities
fail to start.
* Logs in into Sugar automatically.
* Most activities work (some will need some work, but it should not be
caused by problems in Sugar dependencies anymore, but things specific
to the activity). To be precise they start, didn't test them in deeply
Didn't test collaboration yet.
* General polish to make it look closer to a final product.

What fails

* Some quirks with the tamtam activities as usual, probably already
fixed in newer bundles.
* Write does not work as the gtk3 version of pyabiword or the gtk2
version of libabiword are not available in Ubuntu, so both gtk2 and
gtk3 versions of the activity are missing half of the dependencies.
* Etoys and Scratch fail, probably because squeak-vm is not the proper
version, so I'll be packaging that later as well.
* The keyboard and network sections of the CP fail, the code makes
some assumptions about being run in a xo or under fedora, resulting in
unhandled exceptions.
* Sometimes activities may fail to start if you open them right after
logging in, because something with dbus is not yet fully running.
David Farning
Activity Central: http://www.activitycentral.com
--
From IRC 07/19/2013:
"We are interested in creating a community around the project which AC supports but does not control...."
"We are trying to create a community like XSCE to support sugar on ubuntu."
:Discussions on #schoolserver / freenode IRC